Which of the following is not a use of orthoboric acid?

Gallium remains liquid up to ______ Kelvin.

Bone black is used in the manufacture of pyridine.

The atomic radius of gallium is greater than that of aluminum.

Carbon dioxide forms carbonic acid with water.

Half many five-membered rings are there in fullerenes?

What is the chemical formula of the mineral colemanite?

Which of the following is not a component of glass?